One may be seen kissing others in the hall (8,4)
I believe the answer is:
billiard ball
'the hall' is the definition.
The answer and definition can be both man-made objects as well as being singular nouns.
Maybe there's an association between them I don't understand?
'one may be seen kissing others' is the wordplay.
I cannot really understand how this works, but
'one' could be 'li' (I've seen this in other clues) and 'li' is found in the answer.
This may be the basis of the clue (or it may be nonsense).
'in' acts as a link.
Can you help me to learn more?
(Other definitions for billiard ball that I've seen before include "Object to pot" , "Sphere to be pocketed?" , "One of three in game, red, white or spotted" .)